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Issue:ISSN 1000-7083
          CN 51-1193/Q
Director:Sichuan Association for Science and Technology
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Your Position :Home->Past Journals Catalog->2013 Vol.32 No.4

Effect of Mild and Sever Food Restriction on Body Mass and Thermogenesis in Eothenomys miletus
Author of the article:YANG Shengchang, ZHU Wanlong, ZHENG Jia, ZHANG Di, MU Yuan, WANG Zhengkun*
Author's Workplace:(School of Life Sciences, Yunnan Normal University, Kunming 650500, China)
Key Words:food restriction; serum leptin; thermogenesis; Eothenomys miletus
Abstract:

To investigate the energy strategy in response to food restriction, adult Eothenomys miletus were stochastically restricted to 90%, 80% and 70% of ad libitum food intake for four weeks. Survival rate, body mass, body fat content, serum leptin levels, basal metabolic rate (BMR) and nonshivering thermogenesis (NST) in E. miletus were measured. The results showed that there were no deaths when E. miletus were restricted to 90% of ad libitum food intake. However, the lowest survival rate (60%) of E. miletus was observed after 70% of ad libitum food intake for four weeks, and the body mass, body fat content, serum leptin levels, BMR and NST were lower than those in control group. In addition, serum leptin levels were positively correlated with body mass, BMR and NST. These results suggested that E. miletus applied physiological adjustments to adapt the period of food shortage by reducing body mass, body fat content and energy metabolism, providing a support for the “metabolism switch hypothesis”. Serum leptin may acts as a hunger signals, and may be involved in the regulation of energy balance and body mass in E. miletus during the food restriction.

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